<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ajax-post请求方法</title>
    <script src="jquery.js"></script>
</head>

<body>
    <form action="index.html" method="post" enctype="application/x-www-form-urlencoded">
        <input type="text" name="username" placeholder="请输入用户名"> <br>
        <input type="password" name="password" placeholder="请输入密码"> <br>
        <button type="submit">登录</button>
    </form>
</body>

<script>
    // AJAX : Asynchronous javascript and xml
    // 异步的js 与 xml
    // 在不重载页面的条件下更新页面数据
    $('form').submit(function (ev) {
        // 阻止默认事件的发生
        ev.preventDefault();
        console.log('已经阻止默认')
        // 获取表单数据,自动将其转化成字符串序列化对
        // name=value&name=value
        var data = $(this).serialize()
        $.post('index.html', data, function (resData) {

        })
    })

</script>

</html>